Description

Diiodofluorescein is an organoiodine compound derived from fluorescein, widely recognized as a vital intermediate and analytical reagent. Its core value lies in its utility as a precursor for synthesizing specialized dyes, fluorescent probes, and contrast agents. This chemical is particularly important for manufacturers and R&D laboratories in the pharmaceutical, diagnostic, and specialty chemical industries seeking high-purity intermediates for advanced applications.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of iodinated contrast agents and other active pharmaceutical ingredients (APIs).
• Diagnostic Reagent Manufacturing: Used in the production of fluorescent dyes and probes for biological staining and diagnostic assays.
• Research & Development: Serves as a critical reagent in chemical research for developing new fluorescent markers and sensors.
• Specialty Dye Synthesis: Intermediate for manufacturing high-value xanthene dyes with specific optical properties.
• Analytical Chemistry: Employed as a standard or reagent in various chromatographic and spectroscopic analytical methods.

Basic Information

Product Name	Diiodofluorescein
CAS No.	31395-16-1
Molecular Formula	C20H10I2O5
Molecular Weight	584.10 g/mol
Synonyms	4',5'-Diiodofluorescein; 2-(3,4-Diiodo-6-hydroxy-3-oxo-3H-xanthen-9-yl)benzoic acid; DIF; Fluorescein, 4',5'-diiodo-; 4,5-Diiodofluorescein; 4',5'-Diiodo-3',6'-dihydroxyspiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one; Solvent Red 73 (C.I. 45350:1)
EINECS	Contact for details

Quality Control

Our Diiodofluorescein is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards suitable for research and industrial synthesis. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials. Due to its light-sensitive nature, minimize exposure during handling.

Specification

Item	Specification
Appearance	Orange to red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.